Valve cover



FIG. 1 is a front perspective view of a valve cover;

FIG. 2 is a top view of the valve cover;

FIG. 3 is a front view of the valve cover;

FIG. 4 is a left side view of the valve cover;

FIG. 5 is a right side view of the valve cover; and,

FIG. 6 is a rear view of the valve cover.

The broken lines in the figures are for illustrative purposes only and form no part of the claimed design. 

CLAIM The ornamental design for a valve cover, as shown and described. 